The benefits of eating onions to the body are to increase appetite, replenish carbohydrates and other nutrients. 1. Improve appetite: onion is a unique flavor of food, because the pungent flavor of onion can stimulate the taste buds and increase the flavor of food, so it can achieve the effect of increasing appetite, if the patient recently appeared to have a loss of appetite, you can try to eat onion. 2. Supplementary nutrition: onions contain a variety of minerals and vitamins, such as carotene, vitamin C, vitamin E, calcium, zinc, potassium and so on, per 100 grams of onions containing 40 calories, carbohydrates 9.34 grams, 1.1 grams of protein, 0.1 grams of fat, vitamin C7.4 milligrams, calcium 23 milligrams. Eating some onions properly can replenish the nutrients needed in the body, which is helpful to the health of the body. Although eating onions has certain benefits to the body, it is not advisable to consume too much.